Jig for fixing bearing

Abstract

According to the present invention, a jig for fixing a bearing with a tapered bore through a tapered adapter sleeve on a rotational shaft comprises a positioning member which is attached to a housing receiving the bearing and which has a positioning surface for positioning the bearing in the axial direction, and drawing means which engages with the tapered adapter sleeve and which have driving means for moving the drawing means axially so that the tapered adapter sleeve is moved toward the positioning member. Movement of the tapered adapter sleeve generates strong fixing forces between the tapered bore and the tapered adapter sleeve and between the tapered adapter sleeve and the shaft. The positioning surface contacts with an end of inner ring of the bearing, which is located on the small diameter side of tapered bore.

What is claimed is: 
     
       1. A jig for fixing a bearing with a tapered bore through a tapered adapter sleeve on a rotational shaft, comprising: a positioning member for attaching to a housing which receives the bearing, said positioning member having a positioning surface for positioning the bearing in the axial direction, the positioning surface contacting with an end of an inner ring of the bearing, the end of the inner ring being located on the small diameter side of the tapered bore; and   drawing means which engages with the tapered adapter sleeve and has driving means for moving said drawing means axially so that the tapered adapter sleeve is moved toward said positioning member for generating strong fixing forces between the tapered bore and the tapered adapter sleeve and between the tapered adapter sleeve and the shaft.   
     
     
       2. A jig according to claim 1, wherein said drawing means further comprises shaft pressing means for varying the distance between the drawing means and the shaft so that the bearing can be positioned relative to the shaft. 
     
     
       3. A jig according to claim 1, wherein said positioning member further comprises an outer ring positioning surface which contacts with an end of an outer ring of the bearing, the end of the outer ring being located on the small diameter side of the tapered bore so that the outer ring can be positioned in the housing. 
     
     
       4. A jig according to claim 1, wherein the driving means comprises a plurality of pressing members arranged around the axis of the shaft. 
     
     
       5. A jig according to claim 2, wherein the shaft pressing means is arranged on the axis of the shaft. 
     
     
       6. A jig according to claim 1, wherein said positioning member includes a first portion attached to the housing, and a second portion having the positioning surface and a spacer ring arranged therebetween, the width of the spacer ring being varied so that the position of the bearing is varied. 
     
     
       7. A jig according to claim 1, wherein said positioning member has a grease supplying hole opening to the outer radial periphery of the positioning surface so that grease can be supplied to the bearing through the grease supplying hole on fixing the bearing. 
     
     
       8. A jig according to claim 1, wherein said positioning member has an opening through which the shaft can extend outwardly. 
     
     
       9. A jig according to claim 1, wherein the positioning member is sized such that the positioning surface contacts only with the inner ring of the bearing and does not contact with the outer ring of the bearing. 
     
     
       10. A jig according to claim 1, wherein the driving means has bolts engaging with said drawing means and a spacer arranged between said drawing means and said positioning member, the bolts pressing said positioning member through the spacer to move said drawing member axially. 
     
     
       11. A jig for fixing a bearing with a tapered bore through a tapered adapter sleeve on a rotational shaft, comprising: positioning means for positioning the bearing in an axial direction, said positioning means being adapted for attaching to a housing which receives the bearing, and said positioning means including a positioning surface which contacts with an end of an inner ring of the bearing which is located toward the small diameter side of the tapered bore;   drawing means for engaging with the tapered adapter sleeve, said drawing means inter-engaging with said positioning means; and   driving means operatively connected to said drawing means for moving said drawing means along the axial direction such that the tapered adapter sleeve is drawn toward said positioning means and that strong fixing forces are generated between the tapered bore and the tapered adapter sleeve, and between the tapered adapter sleeve and the rotational shaft.